A light ray enters a solid glass sphere of refractive index μ = 3 at an angle of incidence 60 ° . The ray is both reflected and refracted at the farther surface of the sphere. The angle (in degrees) between the reflected and refracted rays at this surface is _____________.

Question

A light ray enters a solid glass sphere of refractive index μ = 3 at an angle of incidence 60 ° . The ray is both reflected and refracted at the farther surface of the sphere. The angle (in degrees) between the reflected and refracted rays at this surface is _____________.,

MARKS App · Accepted Answer

Apply Snell's law at S_ 1 sin 60 ° = 3 sin r sin r = 1 2 r = 30 ° from geometry r ' = 30 ° Again apply snell's law on S 2 3 sinr ' = 1 sine 3 2 = sine ∴ e = 60 ° from geometry r ' + θ + e = 180 ° θ = 90 °

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